I think it's easier on Word and on you if you assign levels logically.
Obviously, your parts are a larger division than your chapters, so set them
up as Level 1 (and I would advise using Heading 1 for this purpose). Set
chapters as Heading 2/Level 2, but *don't* check the box for "Restart
numbering after Level 1." Use Heading 3 for the appendixes. For the rest,
use Heading styles or not as you choose; in any case, since they are not
numbered, they don't need to be part of your outline numbering scheme. For
the Introduction, I would be inclined to use a non-Heading style formatted
to be identical to Heading 2, including the Level 2 outline level, but
without numbering. The advantage of basing the style on Heading 2 is that it
automatically has an outline level, and the outline level is what determines
which paragraphs are picked up by your TOC. You can add an outline level to
any style, of course.
Given your present setup, however, what happens if you select your headings
and press Ctrl+Q? Does the numbering correct itself? Remember that whenever
you need to tweak the numbering, you must go in through the Level 1 style
(Chapter in this instance), and make sure that the numbering is set to start
at 1.

Signature
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
Email cannot be acknowledged; please post all follow-ups to the newsgroup so
all may benefit.
> Win2000:Word2000
>
[quoted text clipped - 66 lines]
> Am I a victim of invisible formatting or should I be restarting
> something?
Paul Terrano - 19 Jan 2005 17:55 GMT
This in the nature of a report rather than another plea for help.
I followed your suggestions, began with an empty document and
established three numbered headings, Part, Chapter and Appendix
at Levels 1, 2 and 3. I formatted the headings in the document
with Heading 1-3 and all appeared in order. I then created a TOC
for levels 1-3 and all the headings changed, each number
increasing by one. Ctrl+Q had no effect on this document, nor did
it have any effect on the previous one.
I went back into Customize Outline Number List which appeared
unchanged. However Levels 4-9 were still linked to the styles,
Heading 4-9, left over from yesterday. As an experiment, I linked
Levels 4-9 to (no style). I think it was when I deleted the TOC
that the numbering of the headings went back to I, 1, A. I
created a new TOC and the numbering stayed put. At least two
steps forward and no steps back.
I don't know how robust this numbering is, so I will do some more
tinkering today and report back.
> I think it's easier on Word and on you if you assign levels logically.
> Obviously, your parts are a larger division than your chapters, so set them
[quoted text clipped - 86 lines]
> > Am I a victim of invisible formatting or should I be restarting
> > something?
Paul Terrano - 19 Jan 2005 19:34 GMT
I linked Levels 5 and 6 to styles Header 5 and 6 and much to my
disappointment nothing in the numbering changed. Out of an excess
of caution, I linked Level 4 to Heading 4 and mirabile dictu,
the numbering went bad. As soon as I unlinked Level 4 (leaving 5
and 6 still linked), the numbering corrected itself. The TOC may
not have anything to do with it.
I repeated the experiment. If I link Level 4 to Heading 4, as
soon as I click OK the numbering collapses. When I link Level 4
to (no styles), clicking OK restores the numbering.
In paragraph 2.1 of Shauna Kelly's"How to create..." she
discusses linking Levels to styles. She says "There's no harm in
doing all 9 Levels, even if you don't intend to use all 9".
However, she also says that this material is based on Word 2002
and Word 2003 so what I'm experiencing may well be an artifact of
Word 2000. I don't mind encountering problems that I can both
reproduce and correct.
> This in the nature of a report rather than another plea for help.
> I followed your suggestions, began with an empty document and
[quoted text clipped - 142 lines]
> restarting
> > > something?
Suzanne S. Barnhill - 20 Jan 2005 00:20 GMT
It's very odd that Heading 4/Level 4 would cause this problem. Is it set to
restart numbering after the next higher level? Or does it include numbering
at all?

Signature
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
Email cannot be acknowledged; please post all follow-ups to the newsgroup so
all may benefit.
> I linked Levels 5 and 6 to styles Header 5 and 6 and much to my
> disappointment nothing in the numbering changed. Out of an excess
[quoted text clipped - 177 lines]
> > restarting
> > > > something?
Paul Terrano - 20 Jan 2005 14:35 GMT
Only the first 3 levels include numbering and there is no
numbering restart anywhere. I'm content to blame it on Word2000
and its many patches.
> It's very odd that Heading 4/Level 4 would cause this problem. Is it set to
> restart numbering after the next higher level? Or does it include numbering
[quoted text clipped - 181 lines]
> > > restarting
> > > > > something?
Suzanne S. Barnhill - 20 Jan 2005 17:57 GMT
If you can make it work, you're ahead of the game. FWIW, numbering seems
much more stable in Word 2002 and 2003.

Signature
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA
Word MVP FAQ site: http://word.mvps.org
Email cannot be acknowledged; please post all follow-ups to the newsgroup so
all may benefit.
> Only the first 3 levels include numbering and there is no
> numbering restart anywhere. I'm content to blame it on Word2000
[quoted text clipped - 238 lines]
> > > > restarting
> > > > > > something?